Mobile data carrier including a transponder having a surface wave component and a slot antenna

Abstract

A mobile data carrier ( 1 ) including a transponder having a slot antenna ( 2 ) and a surface wave component ( 3 ), which serves as transmitter and/or receiver and which is electrically connected to the slot antenna ( 2 ). It is of advantage that the slot antenna ( 2 ) includes an antenna sheet ( 21 ) and an antenna slot ( 22 ), and that the surface wave component ( 3 ) has electrical contactors ( 31, 32 ), which are electrically connected to the left and right of the antenna slot ( 22 ). The surface wave component ( 3 ) is preferably fixed to the underside ( 213 ) of the antenna sheet ( 21 ). An additional, preferably electrically-conducting base plate ( 5 ) is mounted on the above-described arrangement with spacers ( 41, 42 ).

What is claimed is:  
     
         1 . A mobile data carrier including a transponder, comprising: 
 a flat slot antenna;    a plurality of spacers mounted to an underside of the slot antenna;    a base plate mounted to the plurality of spacers, wherein the base plate has an electrically conductive surface; and    a surface wave component, which is electrically connected with the slot antenna.    
     
     
         2 . The mobile data carrier of  claim 1 , wherein the plurality of spacers comprise electrically conductive, metallic spacer bolts.  
     
     
         3 . The mobile data carrier of  claim 1 , wherein the surface wave component comprises a surface wave identification tag.  
     
     
         4 . The mobile data carrier of  claim 1 , wherein the surface wave component comprises a surface wave sensor.  
     
     
         5 . The mobile data carrier of  claim 4 , wherein the slot antenna is plate-shaped.  
     
     
         6 . The mobile data carrier of  claim 1 , wherein the surface wave component is mounted to the underside of the slot antenna.  
     
     
         7 . The mobile data carrier of  claim 1 , wherein, depending of an input impedance of the surface wave component, the surface wave component is positioned either in a center area or in an end area of the slot antenna.  
     
     
         8 . The mobile data carrier of  claim 1 , wherein the slot antenna has an antenna sheet including an antenna slot.  
     
     
         9 . The mobile data carrier of  claim 8 , wherein the surface wave component has electrical contactors, which are electrically connected to the left and right of the antenna slot.  
     
     
         10 . The mobile data carrier of  claim 8 , wherein the antenna slot extends, at least partially, across the surface wave component.  
     
     
         11 . The mobile data carrier of  claim 8 , wherein the antenna sheet has laterally angled edges.  
     
     
         12 . The mobile data carrier of  claim 8 , wherein the antenna slot is formed to extend diagonally in the antenna sheet.  
     
     
         13 . The mobile data carrier of  claim 8 , wherein the antenna slot has an angled shape.  
     
     
         14 . The mobile data carrier of  claim 8 , wherein the antenna slot is S-shaped.  
     
     
         15 . The mobile data carrier of  claim 1 , wherein an interior of the base plate is also electrically conductive.  
     
     
         16 . The mobile data carrier of  claim 1 , wherein the surface wave component is disposed in a space between the slot antenna and the base plate.  
     
     
         17 . The mobile data carrier of  claim 1 , wherein length and width dimensions of the slot antenna are substantially equal to length and width dimensions of the base plate.